GoPro Chest Harness
The Chesty (Chest Harness) makes it easy to capture immersive video and photos from your chest. It’s perfect for skiing, mountain biking, motocross, paddle sports or any activity where you want a more engaging, lower than the helmet view of the action. You’ll capture more of your arms, knees, poles and skis while skiing and more of your arms and handlebars while on your bike or motorcycle. The GoPro Chest Harness is fully adjustable to fit a wide range of adult sizes. The Junior Chesty is available for kids and also adolescents.
Here you can see a neat review by GoPro Tips and Tricks.